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Positive solutions to the sublinear Lane-Emden equation are isolated

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arxiv 1911.09163 v1 pith:SX7FI43W submitted 2019-11-20 math.AP

classification math.AP
keywords boundedequationisolatedlane-emdenpositivesmoothsublinearaccumulation
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abstract

We prove that on a smooth bounded set, the positive least energy solution of the Lane-Emden equation with sublinear power is isolated. As a corollary, we obtain that the first $q-$eigenvalue of the Dirichlet-Laplacian is not an accumulation point of the $q-$spectrum, on a smooth bounded set. Our results extend to a suitable class of Lipschitz domains, as well.

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